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Can someone say p24 antigen Elisa test at which date to be able to detect after exposure...dot immonousaasy method how much day after exposure
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Generally after 3 - 4 months you can see the results.
For further queries do consult.
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Roughly 11 to 15 days to 54 days, it can be positive.
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28 days to three month period
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Hello. It is important to distinguish between the p24 antigen and HIV antibodies, as they appear at different times following a potential exposure.
The p24 antigen is a viral protein that is detectable much earlier than antibodies. Using an immunoassay (ELISA) method:
Initial Detection: The p24 antigen can typically be detected within 18 to 45 days after exposure.
Optimal Timing: Most 4th-generation 'Duo' tests (which look for both the p24 antigen and antibodies) provide a highly reliable result at the 4-week (28-day) mark.
Conclusive Result: While early testing is very accurate, clinical guidelines generally recommend a follow-up test at 90 days (3 months) to be considered 100% conclusive.
If you are currently experiencing symptoms or are within the early window, I recommend scheduling a 4th-generation Combo test now, followed by a final confirmation at the 3-month mark.
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After 3 months .
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-p24 antigen and 4th generation HIV ELISA tests help detect early HIV infection after exposure
-p24 antigen appears earlier than antibodies in the blood
Next Steps
-p24 antigen may become detectable around 14–28 days after exposure
-4th generation HIV ELISA is highly reliable by 4–6 weeks
-A test at 12 weeks is considered conclusive in most guidelines
-If on PEP, testing schedule may vary slightly as advised by your doctor
Health Tips
-Avoid repeated unnecessary testing before the window period
-Follow the advised testing timeline for accurate results
-Practice protected intercourse and avoid anxiety-driven overtesting
-Contact me anytime on Practo for further consultation
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P24 antigen/4th generation HIV ELISA (antigen + antibody) can start detecting infection usually from around 2–4 weeks after exposure, with most cases detected by 4 weeks. A negative 4th generation test at 6 weeks is highly reassuring, and at 12 weeks is considered conclusive in most guidelines.
If you are asking specifically about p24 antigen alone, it is generally detectable around 14–28 days after exposure.
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28 days to 3 months
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It is considered highly reliable from around 28 days after exposure, with final confirmation commonly advised at 45 days to 3 months depending on the situation and testing method.
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The p24 antigen ELISA test (part of the 4th generation Duo/Combo tests) is one of the earliest ways to detect an HIV infection. The p24 antigen is a viral protein that appears in the blood before antibodies are even formed. While it can sometimes be detected as early as 2 weeks, the detection window for most modern immunoassay methods is generally 18 to 45 days after exposure. Testing too early can lead to a 'false negative' because the viral load might not be high enough yet."
Next Steps
Recommended Timeline: "For the most reliable results using a 4th generation test, it is best to test at 4 weeks (28 days) post-exposure. A result at this stage is highly conclusive (around 95%+ accurate)."
Confirmatory Testing: "As per standard medical guidelines, a follow-up test at 90 days (3 months) is recommended to 100% rule out the infection and account for the full 'window period'."
Health Tips
Consultation: "To discuss your specific risk level, symptoms, and to get a formal lab referral for the correct generation of tests, Book a full consultation session via my Practo profile."
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Can help you, kindly consult and provide detailed history for proper diagnosis and further management
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Dr. Gaurav Jaiswal
General Physician
6 yrs exp
Jhansi
Kindly do connect and consult
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Dr. Utkarsh Mittal
General Physician
3 yrs exp
Delhi
P24 antigen: 14-15 days
Dot immunoassay : variable depending on kit
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Dr. Suraj Sharma
General Practitioner
4 yrs exp
Jaipur
Do consult
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Dr. Ravi Kumar Nadella
General Physician
18 yrs exp
Hyderabad
Sure
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Dr. Pragya Choudhary
General Physician
5 yrs exp
Jaipur
28 days or may be 3 months
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